In-depth exploration of partial discharge modelling methods within insulations

Afrouzi, Hadi Nabipour; Hassan, Ateeb; Chee, Daphne Tay Ye; Mehranzamir, Kamyar; Abdul‐Malek, Zulkurnain; Mashak, Saeed Vahabi; Ahmed, Jubaer

doi:10.1016/j.clet.2021.100390

Cited by 11 publications

(7 citation statements)

References 70 publications

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“…Results presented in Figure 7 are in agreement with Peek's work [23], since coefficient b at 100 kPa and 50 Hz is not far from 30 kV peak /cm (Peek results are based on cylinders and this work uses sphere electrodes) and they decrease almost linearly with the pressure of air, since b = E 0 mδ, and the air density δ decreases linearly with pressure. The behavior of coefficient c is different, since it tends to decrease at higher pressures.…”

Section: Resultssupporting

confidence: 86%

“…Peek's law [23] which was empirically derived studying cylindrical conductors, allows determining the visual critical electric field strength Ec occurring at the inception of visual corona as, 0 ( 1)…”

Section: The Generalized Peek's Law For Sphere-to-plane Electrodesmentioning

confidence: 99%

“…For this purpose, this paper studies the role of the curvature radius of the sphere-to-plane geometry, as well as the effect of the operating electrical frequency covering both power and aircraft applications, as well as the effect of environmental pressure. Finite element method (FEM) simulations are also applied to determine the corona extinction electric field strength at CEV conditions, which is fitted to a generalized Peek's law [23] to gather more insight about the discharge conditions. Experimental results and generalized Peek's law presented in this paper could be of interest not only for aircraft electrical insulation designers but also for high-voltage hardware manufacturers operating at high altitude.…”

Section: Introductionmentioning

confidence: 99%

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Measurement of Corona Discharges under Variable Geometry, Frequency and Pressure Environment

Bas-Calopa

Riba

Moreno-Eguilaz

2022

Sensors

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Aeronautical industry is evolving towards more electric aircrafts (MEA), which will require much more electrical power compared to conventional models. To satisfy this increasing power demand and stringent weight requirements, distribution voltages must be raised, which jointly with the low-pressure environment and high operating frequencies increase the risk of electrical discharges occurrence. Therefore, it is important to generate data to design insulation systems for these demanding applications. To this end, in this work a sphere-to-plane electrode configuration is tested for several sphere geometries (diameters ranging from 2 mm to 10 mm), frequencies of 50 Hz, 400 Hz and 800 Hz and pressures in the 20–100 kPa range, to cover most aircraft applications. The corona extinction voltage is experimentally determined by using a gas-filled tube solar blind ultraviolet (UV) sensor. In addition, a CMOS imaging sensor is used to locate the discharge points. Next, to gain further insight to the discharge conditions, the electric field strength is calculated using finite element method (FEM) simulations and fitted to equations based on Peek’s law. The results presented in this paper could be especially valuable to design aircraft electrical insulations as well as for high-voltage hardware manufacturers, since the results allow determining the electric field values at which the components can operate free of surface discharges for a wide altitude range.

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Section: Resultssupporting

confidence: 86%

Section: The Generalized Peek's Law For Sphere-to-plane Electrodesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Measurement of Corona Discharges under Variable Geometry, Frequency and Pressure Environment

Bas-Calopa

Riba

Moreno-Eguilaz

2022

Sensors

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“…Selecting 200Ω as specified in the IEC 60270 standard is appropriate to analyze the impulse signal at nominal values. [25], [32].…”

Section: A Pd Calibrator Analysismentioning

confidence: 99%

“…While decades of research and numerous field reports have investigated the aging and failure of electrical insulation materials, some areas still need to be explored. In particular, a better understanding of the complex relationship between aging mechanisms and tangible quantities such as space charge, PDs, and conduction current will enable us to improve the durability and performance of electrical insulating elements, leading to longer lifetimes of insulating materials [25]. In addition, the PD measurement system's response rate is deeply influenced by the interaction between the PD interfacing network and the object under test, along with the related high-voltage setup.…”

Section: Introductionmentioning

confidence: 99%

Development of an Industrial Partial Discharge Calibrator and Its Performance Tests

Karaman,

Ajder,

Nakir

2024

IEEE Access

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In industrial electromechanical manufacturing, ensuring the accuracy of electrical partial discharge measurements is crucial for the reliability and efficiency of electrical power systems. The cornerstone of such precision is a well-designed partial discharge calibrator that strictly aligns with the IEC 60270 standard parameters, including apparent charge, rise time, and pulse repetition frequency. This research delineates the systematic development and subsequent performance evaluations of an innovative industrial partial discharge calibrator. The calibrator uniquely integrates advanced functionality while maintaining cost efficiency, offering an alternative to the current partial discharge calibrator market. Its design allows for a broad spectrum of pulse frequency adjustments, making it adaptable to various apparent charge bandwidths and highlighting its adaptability for high-voltage applications. Building upon the foundational understanding of partial discharge as characterized by standards such as IEC 60270, the study underscores the calibrator's capacity to elevate the standards of partial discharge measurements within high-voltage equipment.INDEX TERMS high voltage, high voltage test techniques, partial discharge, partial discharge calibrator, partial discharge measurements.

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Partial Discharge Detection Based on Ultrasound Using Optimized Deep Learning Approach

Alshalawi,

Al-Ismail

2024

IEEE Access

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Electrical equipment is prone to different types of Partial Discharge (PD) failures that are varying between minor and severe level. In this paper, Three developed models for Convolution Neural Network (CNN) are proposed to detect and classify four different partial discharge types which are arcing, corona discharge, tracking, looseness as well as healthy equipment situation. Notably, the resulting models exhibited an impressive overall accuracy of more than 94%, which is particularly significant considering the inherent presence of noise in the real-world samples obtained as representative field failures. These findings underscore the robustness and effectiveness of the CNN models in accurately identifying PDs, despite the intricate challenges associated with real-world data.

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In-depth exploration of partial discharge modelling methods within insulations

Cited by 11 publications

References 70 publications

Measurement of Corona Discharges under Variable Geometry, Frequency and Pressure Environment

Measurement of Corona Discharges under Variable Geometry, Frequency and Pressure Environment

Development of an Industrial Partial Discharge Calibrator and Its Performance Tests

Partial Discharge Detection Based on Ultrasound Using Optimized Deep Learning Approach

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